Did you follow up with the 16 potential clients that didn't go with you? I'd start with them and see if you can Identify if there is a common reason you didn't get them. If its something you can work on, maybe you'll get 4 or 5 of them on board.

On 15k fliers realistically how many are you hoping to land as clients?

So if say 1% (150) would contact you and 10% of that 15 would hire you is that an acceptable rate of return?

I remember reading somewhere that for a person to pick up the phone and call after seeing a direct mailer they on average had to see it 6 times. Based on 15k flyers your talking 90k sent out. That a bit on the scary side for me if my assumption of a 1% is accurate...